The Hundertwasserhaus is an apartment complex in Vienna, Austria, designed by Austrian artist Friedensreich Hundertwasser. It was built between 1983 and 1986 by architects Joseph Krawina and Peter Pelikan. Hundertwasser was not paid, stating that it was worth it, to prevent something ugly from being erected. The house features a very organic design, with its uneven floors and plentiful flora. Its roof is covered in grass and trees are grown from within, their limbs extending from the windows. There are 52 apartments, four offices, 16 private terraces and three communal terraces, and a total of 250 trees and bushes. There are also artificial trees; the columns that can be seen reminded Hundertwasser of trees. The windows and mosaic tiles are laid out not in a grid, but in a more playful organic way, with crooked angles.